<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../vue.js"></script>

</head>
<style>
    .public {
        width: 100px;
        height: 100px;
    }

    .active {
        background-color: red;
    }

    .noActive {
        background-color: yellowgreen;
    }

    .color {
        color: blueviolet;
    }

    .bold {
        font-weight: bold;
    }

    .italic {
        font-style: italic;
    }
    .org{
        background: rgb(223, 174, 76);
    }
    .pink{
        background-color: pink;
    }
</style>

<body>
    <div id="app">
        <!-- 
      1.动态class:值是一个字符串
        用法:类名一般只有一个,并且不确定是哪一个
     -->
        <div class="public" :class="isActive?'active':'noActive'">b1</div>
        <div class="public" :class="ColorClass">b2</div>

        <!-- 
      2.动态class:值是一个对象,对象的key都是需要的class名称,值是布尔值,通过布尔值来控制当前类是否使用
        用法:类固定,但是不确定用不用
     -->
<div class="public" :class="box3Class">org-box</div>
<div class="public" :class="{org:isOrg,bold:isBold,italic:isItalic}"></div>

       <!-- 
      3.动态class:值是一个数组
        用法:类型个数不固定,可以操作数组,对类名进行增删改
     -->
<div class="public" :class="classArr">
box5
</div>
    </div>
    <script>
        Vue.config.productionTips =false;
        const vm = new Vue({
            el: "#app",
            data() {
                return {
                    isActive: false,
                    ColorClass: "color",
                   box3Class:{
                    org: true,
                    bold:true,
                    italic:false
                   },
                   iscolor:true,
                   isBold:true,
                   isItalic:true,
                   isOrg:true,
                   classArr:["pink","italic","color"]

                }
            }
        })
    </script>
</body>

</html>